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diff --git a/fpga/usrp1/toplevel/usrp_multi/usrp_multi.v b/fpga/usrp1/toplevel/usrp_multi/usrp_multi.v
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+// -*- verilog -*-
+//
+// USRP - Universal Software Radio Peripheral
+//
+// Copyright (C) 2003,2004,2005,2006 Matt Ettus
+// Copyright (C) 2006 Martin Dudok van Heel
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Boston, MA 02110-1301 USA
+//
+
+// Top level module for a full setup with DUCs and DDCs
+
+// Define DEBUG_OWNS_IO_PINS if we're using the daughterboard i/o pins
+// for debugging info. NB, This can kill the m'board and/or d'board if you
+// have anything except basic d'boards installed.
+
+// Uncomment the following to include optional circuitry
+
+`include "config.vh"
+`include "../../common/fpga_regs_common.v"
+`include "../../common/fpga_regs_standard.v"
+
+module usrp_multi
+(output MYSTERY_SIGNAL,
+ input master_clk,
+ input SCLK,
+ input SDI,
+ inout SDO,
+ input SEN_FPGA,
+
+ input FX2_1,
+ output FX2_2,
+ output FX2_3,
+
+ input wire [11:0] rx_a_a,
+ input wire [11:0] rx_b_a,
+ input wire [11:0] rx_a_b,
+ input wire [11:0] rx_b_b,
+
+ output wire [13:0] tx_a,
+ output wire [13:0] tx_b,
+
+ output wire TXSYNC_A,
+ output wire TXSYNC_B,
+
+ // USB interface
+ input usbclk,
+ input wire [2:0] usbctl,
+ output wire [1:0] usbrdy,
+ inout [15:0] usbdata, // NB Careful, inout
+
+ // These are the general purpose i/o's that go to the daughterboard slots
+ inout wire [15:0] io_tx_a,
+ inout wire [15:0] io_tx_b,
+ inout wire [15:0] io_rx_a,
+ inout wire [15:0] io_rx_b
+ );
+ wire [15:0] debugdata,debugctrl;
+ assign MYSTERY_SIGNAL = 1'b0;
+
+ wire clk64,clk128;
+
+ wire WR = usbctl[0];
+ wire RD = usbctl[1];
+ wire OE = usbctl[2];
+
+ wire have_space, have_pkt_rdy;
+ assign usbrdy[0] = have_space;
+ assign usbrdy[1] = have_pkt_rdy;
+
+ wire tx_underrun, rx_overrun;
+ wire clear_status = FX2_1;
+ assign FX2_2 = rx_overrun;
+ assign FX2_3 = tx_underrun;
+
+ wire [15:0] usbdata_out;
+
+ wire [3:0] dac0mux,dac1mux,dac2mux,dac3mux;
+
+ wire tx_realsignals;
+ wire [3:0] rx_numchan;
+ wire [2:0] tx_numchan;
+
+ wire [7:0] interp_rate, decim_rate;
+ wire [15:0] tx_debugbus, rx_debugbus;
+
+ wire enable_tx, enable_rx;
+ wire reset_data;
+`ifdef MULTI_ON
+ wire sync_rx;
+ assign reset_data = sync_rx;
+`else
+ assign reset_data = 1'b0;
+`endif // `ifdef MULTI_ON
+
+ wire tx_dsp_reset, rx_dsp_reset, tx_bus_reset, rx_bus_reset;
+ wire [7:0] settings;
+
+ // Tri-state bus macro
+ bustri bustri( .data(usbdata_out),.enabledt(OE),.tridata(usbdata) );
+
+ assign clk64 = master_clk;
+
+ wire [15:0] ch0tx,ch1tx,ch2tx,ch3tx; //,ch4tx,ch5tx,ch6tx,ch7tx;
+ wire [15:0] ch0rx,ch1rx,ch2rx,ch3rx,ch4rx,ch5rx,ch6rx,ch7rx;
+
+ // TX
+ wire [15:0] i_out_0,i_out_1,q_out_0,q_out_1;
+ wire [15:0] bb_tx_i0,bb_tx_q0,bb_tx_i1,bb_tx_q1; // bb_tx_i2,bb_tx_q2,bb_tx_i3,bb_tx_q3;
+
+ wire strobe_interp, tx_sample_strobe;
+ wire tx_empty;
+
+ wire serial_strobe;
+ wire [6:0] serial_addr;
+ wire [31:0] serial_data;
+
+ reg [15:0] debug_counter;
+`ifdef COUNTER_32BIT_ON
+ reg [31:0] sample_counter_32bit;
+`endif // `ifdef COUNTER_32BIT_ON
+ reg [15:0] loopback_i_0,loopback_q_0;
+
+ ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ // Transmit Side
+`ifdef TX_ON
+ assign bb_tx_i0 = ch0tx;
+ assign bb_tx_q0 = ch1tx;
+ assign bb_tx_i1 = ch2tx;
+ assign bb_tx_q1 = ch3tx;
+
+ tx_buffer tx_buffer
+ ( .usbclk(usbclk),.bus_reset(tx_bus_reset),.reset(tx_dsp_reset),
+ .usbdata(usbdata),.WR(WR),.have_space(have_space),.tx_underrun(tx_underrun),
+ .channels({tx_numchan,1'b0}),
+ .tx_i_0(ch0tx),.tx_q_0(ch1tx),
+ .tx_i_1(ch2tx),.tx_q_1(ch3tx),
+ .tx_i_2(),.tx_q_2(),
+ .tx_i_3(),.tx_q_3(),
+ .txclk(clk64),.txstrobe(strobe_interp),
+ .clear_status(clear_status),
+ .tx_empty(tx_empty),
+ .debugbus(tx_debugbus) );
+
+ tx_chain tx_chain_0
+ ( .clock(clk64),.reset(tx_dsp_reset),.enable(enable_tx),
+ .interp_rate(interp_rate),.sample_strobe(tx_sample_strobe),
+ .interpolator_strobe(strobe_interp),.freq(),
+ .i_in(bb_tx_i0),.q_in(bb_tx_q0),.i_out(i_out_0),.q_out(q_out_0) );
+
+ tx_chain tx_chain_1
+ ( .clock(clk64),.reset(tx_dsp_reset),.enable(enable_tx),
+ .interp_rate(interp_rate),.sample_strobe(tx_sample_strobe),
+ .interpolator_strobe(strobe_interp),.freq(),
+ .i_in(bb_tx_i1),.q_in(bb_tx_q1),.i_out(i_out_1),.q_out(q_out_1) );
+
+ setting_reg #(`FR_TX_MUX)
+ sr_txmux(.clock(clk64),.reset(tx_dsp_reset),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),
+ .out({dac3mux,dac2mux,dac1mux,dac0mux,tx_realsignals,tx_numchan}));
+
+ wire [15:0] tx_a_a = dac0mux[3] ? (dac0mux[1] ? (dac0mux[0] ? q_out_1 : i_out_1) : (dac0mux[0] ? q_out_0 : i_out_0)) : 16'b0;
+ wire [15:0] tx_b_a = dac1mux[3] ? (dac1mux[1] ? (dac1mux[0] ? q_out_1 : i_out_1) : (dac1mux[0] ? q_out_0 : i_out_0)) : 16'b0;
+ wire [15:0] tx_a_b = dac2mux[3] ? (dac2mux[1] ? (dac2mux[0] ? q_out_1 : i_out_1) : (dac2mux[0] ? q_out_0 : i_out_0)) : 16'b0;
+ wire [15:0] tx_b_b = dac3mux[3] ? (dac3mux[1] ? (dac3mux[0] ? q_out_1 : i_out_1) : (dac3mux[0] ? q_out_0 : i_out_0)) : 16'b0;
+
+ wire txsync = tx_sample_strobe;
+ assign TXSYNC_A = txsync;
+ assign TXSYNC_B = txsync;
+
+ assign tx_a = txsync ? tx_b_a[15:2] : tx_a_a[15:2];
+ assign tx_b = txsync ? tx_b_b[15:2] : tx_a_b[15:2];
+`endif // `ifdef TX_ON
+
+ /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ // Receive Side
+`ifdef RX_ON
+ wire rx_sample_strobe,strobe_decim,hb_strobe;
+ wire [15:0] bb_rx_i0,bb_rx_q0,bb_rx_i1,bb_rx_q1,
+ bb_rx_i2,bb_rx_q2,bb_rx_i3,bb_rx_q3;
+
+ wire loopback = settings[0];
+ wire counter = settings[1];
+`ifdef COUNTER_32BIT_ON
+ wire counter_32bit = settings[2];
+
+ always @(posedge clk64)
+ if(rx_dsp_reset)
+ sample_counter_32bit <= #1 32'd0;
+ else if(~enable_rx | reset_data)
+ sample_counter_32bit <=#1 32'd0;
+ else if(hb_strobe)
+ sample_counter_32bit <=#1 sample_counter_32bit + 32'd1;
+`endif // `ifdef COUNTER_32BIT_ON
+
+ always @(posedge clk64)
+ if(rx_dsp_reset)
+ debug_counter <= #1 16'd0;
+ else if(~enable_rx)
+ debug_counter <= #1 16'd0;
+ else if(hb_strobe)
+ debug_counter <=#1 debug_counter + 16'd2;
+
+ always @(posedge clk64)
+ if(strobe_interp)
+ begin
+ loopback_i_0 <= #1 ch0tx;
+ loopback_q_0 <= #1 ch1tx;
+ end
+
+`ifdef COUNTER_32BIT_ON
+ assign ch0rx = counter_32bit?sample_counter_32bit[31:16]:counter ? debug_counter : loopback ? loopback_i_0 : bb_rx_i0;
+ assign ch1rx = counter_32bit?sample_counter_32bit[15:0]:counter ? debug_counter + 16'd1 : loopback ? loopback_q_0 : bb_rx_q0;
+ assign ch2rx = bb_rx_i1;
+ assign ch3rx = bb_rx_q1;
+ assign ch4rx = counter_32bit?bb_rx_i0:bb_rx_i2;
+ assign ch5rx = counter_32bit?bb_rx_q0:bb_rx_q2;// If using counter replicate channels here to be able to get rx_i0 when using counter
+ //This means if you use 4 channels that channel 3 will be replaced by channel 0
+ // and channel 0 will output the 32 bit counter.
+ assign ch6rx = bb_rx_i3;
+ assign ch7rx = bb_rx_q3;
+`else
+ assign ch0rx = counter ? debug_counter : loopback ? loopback_i_0 : bb_rx_i0;
+ assign ch1rx = counter ? debug_counter + 16'd1 : loopback ? loopback_q_0 : bb_rx_q0;
+ assign ch2rx = bb_rx_i1;
+ assign ch3rx = bb_rx_q1;
+ assign ch4rx = bb_rx_i2;
+ assign ch5rx = bb_rx_q2;
+ assign ch6rx = bb_rx_i3;
+ assign ch7rx = bb_rx_q3;
+`endif // `ifdef COUNTER_32BIT_ON
+
+
+ wire [15:0] ddc0_in_i,ddc0_in_q,ddc1_in_i,ddc1_in_q,ddc2_in_i,ddc2_in_q,ddc3_in_i,ddc3_in_q;
+ adc_interface adc_interface(.clock(clk64),.reset(rx_dsp_reset),.enable(1'b1),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .rx_a_a(rx_a_a),.rx_b_a(rx_b_a),.rx_a_b(rx_a_b),.rx_b_b(rx_b_b),
+ .ddc0_in_i(ddc0_in_i),.ddc0_in_q(ddc0_in_q),
+ .ddc1_in_i(ddc1_in_i),.ddc1_in_q(ddc1_in_q),
+ .ddc2_in_i(ddc2_in_i),.ddc2_in_q(ddc2_in_q),
+ .ddc3_in_i(ddc3_in_i),.ddc3_in_q(ddc3_in_q),.rx_numchan(rx_numchan) );
+
+ rx_buffer rx_buffer
+ ( .usbclk(usbclk),.bus_reset(rx_bus_reset),.reset(rx_dsp_reset | reset_data),
+ .reset_regs(rx_dsp_reset),
+ .usbdata(usbdata_out),.RD(RD),.have_pkt_rdy(have_pkt_rdy),.rx_overrun(rx_overrun),
+ .channels(rx_numchan),
+ .ch_0(ch0rx),.ch_1(ch1rx),
+ .ch_2(ch2rx),.ch_3(ch3rx),
+ .ch_4(ch4rx),.ch_5(ch5rx),
+ .ch_6(ch6rx),.ch_7(ch7rx),
+ .rxclk(clk64),.rxstrobe(hb_strobe),
+ .clear_status(clear_status),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .debugbus(rx_debugbus) );
+
+ `ifdef RX_EN_0
+ rx_chain #(`FR_RX_FREQ_0,`FR_RX_PHASE_0) rx_chain_0
+ ( .clock(clk64),.reset(reset_data),.enable(enable_rx),
+ .decim_rate(decim_rate),.sample_strobe(rx_sample_strobe),.decimator_strobe(strobe_decim),.hb_strobe(hb_strobe),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .i_in(ddc0_in_i),.q_in(ddc0_in_q),.i_out(bb_rx_i0),.q_out(bb_rx_q0),.debugdata(debugdata),.debugctrl(debugctrl));
+ `else
+ assign bb_rx_i0=16'd0;
+ assign bb_rx_q0=16'd0;
+ `endif
+
+ `ifdef RX_EN_1
+ rx_chain #(`FR_RX_FREQ_1,`FR_RX_PHASE_1) rx_chain_1
+ ( .clock(clk64),.reset(reset_data),.enable(enable_rx),
+ .decim_rate(decim_rate),.sample_strobe(rx_sample_strobe),.decimator_strobe(strobe_decim),.hb_strobe(),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .i_in(ddc1_in_i),.q_in(ddc1_in_q),.i_out(bb_rx_i1),.q_out(bb_rx_q1));
+ `else
+ assign bb_rx_i1=16'd0;
+ assign bb_rx_q1=16'd0;
+ `endif
+
+ `ifdef RX_EN_2
+ rx_chain #(`FR_RX_FREQ_2,`FR_RX_PHASE_2) rx_chain_2
+ ( .clock(clk64),.reset(reset_data),.enable(enable_rx),
+ .decim_rate(decim_rate),.sample_strobe(rx_sample_strobe),.decimator_strobe(strobe_decim),.hb_strobe(),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .i_in(ddc2_in_i),.q_in(ddc2_in_q),.i_out(bb_rx_i2),.q_out(bb_rx_q2));
+ `else
+ assign bb_rx_i2=16'd0;
+ assign bb_rx_q2=16'd0;
+ `endif
+
+ `ifdef RX_EN_3
+ rx_chain #(`FR_RX_FREQ_3,`FR_RX_PHASE_3) rx_chain_3
+ ( .clock(clk64),.reset(reset_data),.enable(enable_rx),
+ .decim_rate(decim_rate),.sample_strobe(rx_sample_strobe),.decimator_strobe(strobe_decim),.hb_strobe(),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .i_in(ddc3_in_i),.q_in(ddc3_in_q),.i_out(bb_rx_i3),.q_out(bb_rx_q3));
+ assign bb_rx_i3=16'd0;
+ assign bb_rx_q3=16'd0;
+ `endif
+
+`endif // `ifdef RX_ON
+
+ ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ // Control Functions
+
+ wire [31:0] capabilities;
+ assign capabilities[7] = `TX_CAP_HB;
+ assign capabilities[6:4] = `TX_CAP_NCHAN;
+ assign capabilities[3] = `RX_CAP_HB;
+ assign capabilities[2:0] = `RX_CAP_NCHAN;
+
+
+ serial_io serial_io
+ ( .master_clk(clk64),.serial_clock(SCLK),.serial_data_in(SDI),
+ .enable(SEN_FPGA),.reset(1'b0),.serial_data_out(SDO),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .readback_0({io_rx_a,io_tx_a}),.readback_1({io_rx_b,io_tx_b}),.readback_2(capabilities),.readback_3(32'hf0f0931a) );
+
+ wire [15:0] reg_0,reg_1,reg_2,reg_3;
+
+`ifdef MULTI_ON
+
+ master_control_multi master_control
+ ( .master_clk(clk64),.usbclk(usbclk),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .rx_slave_sync(io_rx_a[`bitnoFR_RX_SYNC_INPUT_IOPIN]),
+ .tx_bus_reset(tx_bus_reset),.rx_bus_reset(rx_bus_reset),
+ .tx_dsp_reset(tx_dsp_reset),.rx_dsp_reset(rx_dsp_reset),
+ .enable_tx(enable_tx),.enable_rx(enable_rx),
+ .sync_rx(sync_rx),
+ .interp_rate(interp_rate),.decim_rate(decim_rate),
+ .tx_sample_strobe(tx_sample_strobe),.strobe_interp(strobe_interp),
+ .rx_sample_strobe(rx_sample_strobe),.strobe_decim(strobe_decim),
+ .tx_empty(tx_empty),
+ //.debug_0(rx_a_a),.debug_1(ddc0_in_i),
+ .debug_0(rx_debugbus),.debug_1(ddc0_in_i),
+ .debug_2({rx_sample_strobe,strobe_decim,serial_strobe,serial_addr}),.debug_3({rx_dsp_reset,tx_dsp_reset,rx_bus_reset,tx_bus_reset,enable_rx,tx_underrun,rx_overrun,decim_rate}),
+ .reg_0(reg_0),.reg_1(reg_1),.reg_2(reg_2),.reg_3(reg_3) );
+
+`else //`ifdef MULTI_ON
+
+ master_control master_control
+ ( .master_clk(clk64),.usbclk(usbclk),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe),
+ .tx_bus_reset(tx_bus_reset),.rx_bus_reset(rx_bus_reset),
+ .tx_dsp_reset(tx_dsp_reset),.rx_dsp_reset(rx_dsp_reset),
+ .enable_tx(enable_tx),.enable_rx(enable_rx),
+ .interp_rate(interp_rate),.decim_rate(decim_rate),
+ .tx_sample_strobe(tx_sample_strobe),.strobe_interp(strobe_interp),
+ .rx_sample_strobe(rx_sample_strobe),.strobe_decim(strobe_decim),
+ .tx_empty(tx_empty),
+ //.debug_0(rx_a_a),.debug_1(ddc0_in_i),
+ .debug_0(rx_debugbus),.debug_1(ddc0_in_i),
+ .debug_2({rx_sample_strobe,strobe_decim,serial_strobe,serial_addr}),.debug_3({rx_dsp_reset,tx_dsp_reset,rx_bus_reset,tx_bus_reset,enable_rx,tx_underrun,rx_overrun,decim_rate}),
+ .reg_0(reg_0),.reg_1(reg_1),.reg_2(reg_2),.reg_3(reg_3) );
+
+`endif //`ifdef MULTI_ON
+
+ io_pins io_pins
+ (.io_0(io_tx_a),.io_1(io_rx_a),.io_2(io_tx_b),.io_3(io_rx_b),
+ .reg_0(reg_0),.reg_1(reg_1),.reg_2(reg_2),.reg_3(reg_3),
+ .clock(clk64),.rx_reset(rx_dsp_reset),.tx_reset(tx_dsp_reset),
+ .serial_addr(serial_addr),.serial_data(serial_data),.serial_strobe(serial_strobe));
+
+ ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+ // Misc Settings
+ setting_reg #(`FR_MODE) sr_misc(.clock(clk64),.reset(rx_dsp_reset),.strobe(serial_strobe),.addr(serial_addr),.in(serial_data),.out(settings));
+
+endmodule // usrp_multi
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